implemented encodeGemResponse

src/Network/Gemini/Capsule/Encoding.hs

@@ -30,15 +30,21 @@ module Network.Gemini.Capsule.Encoding (
   encodeGemURL,
   decodeGemURL,
   escapeString,
-  unescapeString
+  unescapeString,
+  encodeGemResponse
 ) where
 
 import qualified Data.ByteString as BS
-import Data.ByteString.Builder (charUtf8, stringUtf8, toLazyByteString)
+import Data.ByteString.Builder (
+  charUtf8,
+  lazyByteString,
+  stringUtf8,
+  toLazyByteString,
+  word8Dec)
 import qualified Data.ByteString.Lazy as BSL
 import Data.Char (chr, ord, toLower)
 import Data.List (find, intercalate)
-import Data.Maybe (fromJust)
+import Data.Maybe (fromJust, fromMaybe)
 import qualified Data.Text as T
 import Data.Text.Encoding (decodeUtf8')
 
@@ -137,6 +143,25 @@ unescapeString str = case decodeUtf8' $ BS.pack $ toBytes str of
     toNum ch = fst $ fromJust $
       find (\x -> snd x == ch) $ zip [0..] hexDigits
 
+-- | encodes a 'GemResponse' into a lazy ByteString
+encodeGemResponse :: GemResponse -> BSL.ByteString
+encodeGemResponse resp = let
+  code = respStatus resp
+  high = code `div` 10
+  low  = code `mod` 10
+  meta = respMeta resp
+  body = fromMaybe "" $ respBody resp
+
+  builder
+    =  word8Dec high
+    <> word8Dec low
+    <> charUtf8 ' '
+    <> stringUtf8 meta
+    <> stringUtf8 "\r\n"
+    <> lazyByteString body
+
+  in toLazyByteString builder
+
 hexDigits :: String
 hexDigits = ['0'..'9'] ++ ['a'..'f']
 

src/Network/Gemini/Capsule/Internal.hs

@@ -35,7 +35,6 @@ time.
 module Network.Gemini.Capsule.Internal (
   runConnection,
   readURL,
-  sendResponse,
   strFromConn,
   readMax,
   stripCRLF
@@ -47,7 +46,7 @@ import Control.Monad.Trans.Maybe (MaybeT (..))
 import qualified Data.ByteString as BS
 import Data.ByteString.Builder (Builder, byteString, toLazyByteString)
 import qualified Data.ByteString.Lazy as BSL
-import Data.Connection (Connection, source)
+import Data.Connection (Connection, send, source)
 import qualified Data.Text as T
 import Data.Text.Encoding (decodeUtf8')
 import Data.X509 (Certificate)
@@ -87,15 +86,6 @@ readURL conn =
     Nothing  -> Nothing
     Just str -> decodeGemURL str
 
--- | Sends a 'GemResponse' to a 'Connection'
-sendResponse
-  :: Connection a
-  -- ^ the connection
-  -> GemResponse
-  -- ^ the response being sent
-  -> IO ()
-sendResponse = undefined
-
 -- | Reads up to a maxumum number of bytes from a 'Connection', UTF-8
 -- decodes it, and returns the resulting string (if possible) without
 -- the trailing CR/LF
@@ -150,4 +140,12 @@ readLoop maxLen src = lift (S.read src) >>= \case
       then return b
       else (b <>) <$> readLoop (maxLen - len) src
 
+sendResponse
+  :: Connection a
+  -- ^ the connection
+  -> GemResponse
+  -- ^ the response being sent
+  -> IO ()
+sendResponse conn resp = send conn $ encodeGemResponse resp
+
 --jl